Fix the gr/gl destruction order in Test.cpp

R=djsollen@google.com
Review URL: https://codereview.appspot.com/6851126

git-svn-id: http://skia.googlecode.com/svn/trunk@6602 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/Test.cpp b/tests/Test.cpp
index bebb351..6953d94 100644
--- a/tests/Test.cpp
+++ b/tests/Test.cpp
@@ -90,9 +90,9 @@
 
 void GpuTest::DestroyContext() {
 #if SK_SUPPORT_GPU
-    // preserve this order, we want gGrContext destroyed after gEGLContext
-    gGLContext.reset(NULL);
+    // preserve this order, we want gGrContext destroyed before gGLContext
     gGrContext.reset(NULL);
+    gGLContext.reset(NULL);
 #endif
 }